9x减36等于6x
    49减5x等于 36加7x
    sqrt(3t^2-12t+12)=3-t
    5x²=81
    8（1000-X）+5X=6950
    8（1000-X）+5X=6950
    8（1000-X）+5X=6950
    8（1000-X）+5X=6950
    27t-5t²＝9.6
    (92+90+x)÷3+4=x
    100-100*(e^(-(x/50)^1.1))=99
    100-100*e(-(x/50)^1.1)=99
    100-100×e^((-(x/50)^1.1))=1
    100-100*e^((-(x/50)^1.1))=1
    100-100*e^((-(x/50)^1.1))=1
    100-100*exp(-(x/50)^1.1)=1
    450-x=x/0.75
    450-x=x/tan37
    x/50- x+120/50+6 ＝3
    50000=(x-50)*1800-50000

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